ABB INSUM MCU2 MCU2A02V2-4 1SCA022657R9090 Intelligent Motor Control Unit

ABB INSUM MCU2 MCU2A02V2‑4 Order Number: 1SCA022657R9090 Detailed Explanation of the Intelligent Motor Control Unit
I. Basic Material Information
Brand: ABB
Product Series: INSUM Intelligent Motor Management System (MCC Intelligent Motor Control)
Unit Model: MCU2A02V2‑4 (High-end Motor Control Unit of MCU2)
Official Order Code: 1SCA022657R9090
Origin: Sweden / Switzerland
System: INSUM is the core component of ABB’s low-voltage intelligent motor control center (iMCC), while MCU2 is the advanced motor protection controller, and MCU1 is the basic model.

Core Positioning and Functions
MCU2A02V2‑4 is an integrated motor control + protection + communication intelligent unit, directly installed in the low-voltage drawer-type MCC motor circuit, replacing the traditional thermal relay + contactor auxiliary circuit to achieve full life cycle management of the motor:
1. Motor Protection Functions
Overload and overheating protection (thermal memory curve), phase failure / three-phase imbalance protection, stalling protection, short circuit protection, underload protection, grounding leakage protection;
Current measurement range: 0.1–3.2A, suitable for small power motors; can monitor 380~690VAC three-phase main circuit voltage;
Supports motor start limit, start timeout protection to avoid burning the winding due to frequent start-stop.
2. Local & Remote Control
Local start-stop operation + DCS/PLC remote start-stop control;
Can achieve direct start, star-delta start, soft start logic combination;
Real-time collection of running current, voltage, power, running time, start-stop times.
3. Bus Communication (INSUM Bus)
Through the INSUM field bus, motor operation data and fault codes are uploaded to the upper-level monitoring system;
Supports Modbus RTU connection to SCADA/PLC, can remotely read fault records, modify protection parameters, reset tripping;
Equipped with event logs, which can trace the cause of tripping and fault time, facilitating maintenance and troubleshooting.
4. Power Supply Specifications
This MCU2A02V2‑4 auxiliary power supply: 24VDC ±10%, power consumption is approximately 4.7W; Some sub-models of the MCU2 series also support 230VAC auxiliary power supply.
Exterior flame retardant grade UL94 V‑0, halogen-free, suitable for harsh environments of switch cabinets drawers.

Model Disassembly
INSUM MCU2: The second-generation advanced motor controller series of INSUM
MCU2A02V2‑4: Specific hardware version, 02 corresponds to the small current measurement section, V2 is the firmware version
1SCA022657R9090: The only global business order code of ABB, this code must be filled in for customs declaration, PI, and procurement to avoid sending the wrong goods

Typical Application Scenarios
Low-voltage intelligent MCC motor control cabinet for factories: motor protection control for water pumps, fans, conveyor belts, compressor motors;
Large-scale centralized monitoring of motors in chemical, water treatment, papermaking, and metallurgical workshops;
Intelligent operation and maintenance of HVAC fans / pump groups in buildings;
Intelligent transformation of old traditional MCC cabinets, uploading motor operation data to the factory energy management system.